Upload Files to SharePoint Library Remotely using Client Object Model (CSOM) and PowerShell

Requirement: Upload files to SharePoint document library remotely.

PowerShell Script to Upload a File to SharePoint Library using Client Object Model:
We can upload files to SharePoint Online or SharePoint on-premises document libraries remotely using PowerShelland client side object model (CSOM). 

#Load SharePoint CSOM Assemblies
[System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint.Client") | Out-Null
[System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint.Client.Runtime") | Out-Null

##Variables for Processing
$SiteUrl = "http://mgmt.crescent.com/"
$LibraryName="Proposal Documents"
$SourceFile ="D:\Reports\MonthlyRpt.csv"

#Setup Credentials to connect
$Credentials = [System.Net.CredentialCache]::DefaultCredentials  #Current User Credentials
#connect using user account/password
#$Credentials = New-Object System.Net.NetworkCredential($UserName, (ConvertTo-SecureString $Password -AsPlainText -Force))
#For Office 365, Use:
#$Credentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($UserName,(ConvertTo-SecureString $Password -AsPlainText -Force))

#Set up the context
$Context = New-Object Microsoft.SharePoint.Client.ClientContext($SiteUrl) 
$Context.Credentials = $credentials
$web = $Context.Web

#Get the Library
$List = $web.Lists.GetByTitle($LibraryName)
$Context.Load($List)
$Context.ExecuteQuery()

#Get File Name from source file path
$SourceFileName = Split-path $SourceFile -leaf 

#Get Source file contents
$FileStream = ([System.IO.FileInfo] (Get-Item $SourceFile)).OpenRead()

#Upload to SharePoint
$FileCreationInfo = New-Object Microsoft.SharePoint.Client.FileCreationInformation
$FileCreationInfo.Overwrite = $true
$FileCreationInfo.ContentStream = $FileStream
$FileCreationInfo.URL = $SourceFileName
$FileUploaded = $List.RootFolder.Files.Add($FileCreationInfo)
$Context.Load($FileUploaded)
$Context.ExecuteQuery()

#Set Metadata
$properties = $FileUploaded.ListItemAllFields;
$context.Load($properties)
$properties["Category"]="Reports"
$properties.Update() 
$context.ExecuteQuery()

#Close file stream
$FileStream.Close()

Important: Make sure you have SharePoint 2013 Client Components SDK installed in your client machine prior running this script!